Michigan Daycare Well Water and Radon Testing Requirements

Two Environmental Tests Most Urban Applicants Don't Think About

If your home runs on municipal water and city sewer, you can skip the well water testing. But if your property uses a private well or septic system — common across rural Michigan, from the Upper Peninsula down through the Thumb region — MiLEAP's licensing rules require environmental health inspections before you can receive your child care home license.

Radon testing, on the other hand, applies to every applicant regardless of water source. Under rule R 400.1915, you must test the lowest level of your home used for child care and document that radon gas concentration falls below the action threshold.

Well Water Testing Requirements

Properties relying on a private well must have the water tested through your local county health department. The applicant files a request for an on-site water supply evaluation, and a county sanitarian collects samples and inspects the physical system.

The state laboratory in Lansing analyzes water samples for partial chemical indicators. Results typically take up to five weeks — so start this process early in your licensing timeline.

Key thresholds your well water must meet:

• Coliform bacteria: absent in the test result; ask the county health department what treatment or retesting it requires if detected
• Nitrates: at or below 10 parts per million
• Arsenic: at or below 10 parts per billion
• Lead and copper: safe levels per state standards

Your septic system also gets scrutinized. The wellhead must maintain at least 50 feet of physical separation from any septic tank or drainfield. If the existing layout doesn't meet isolation standards, you may need engineering modifications before the health department signs off.

Radon Testing Requirements

Rule R 400.1915 requires you to test the lowest floor level of your home for radon gas. The documented concentration must fall below 4.0 picocuries per liter of air (pCi/L).

Use a testing method accepted by the CCLB and retain the laboratory report; confirm whether a short-term kit or long-term detector meets current requirements before relying on it. Costs and turnaround depend on the method and provider.

If your levels come back at or above 4.0 pCi/L, you need a radon mitigation system installed before MiLEAP will issue your license. Professional mitigation typically costs $1,000 to $3,000 for a sub-slab depressurization system, which routes radon gas from beneath the foundation to the outside through a PVC vent pipe.

After mitigation, you must retest to confirm levels have dropped below the threshold. And it doesn't end there — the licensing rules require retesting every four years to verify the system continues working.

Timing These Tests in Your Licensing Timeline

Environmental testing belongs early in the process — ideally before you pay your CCHIRP application fee. If your well water fails or your radon levels are high, you're looking at weeks of remediation before you can proceed. Testing early means you discover problems while they're still fixable without derailing your entire timeline.

The smart sequence:

1. Arrange radon testing through an accepted method
2. Schedule county health department well/septic evaluation
3. Receive the radon laboratory report
4. Receive well water lab results (up to 5 weeks)
5. If both pass, proceed to CCHIRP application

If either test fails, you address the issue — install mitigation, treat the well, adjust septic isolation — and retest before moving forward with the state application and its non-refundable fees.

Getting the Full Pre-Application Checklist

Environmental testing is just one piece of the feasibility work you should complete before spending money on state fees. Our Michigan Home Daycare Licensing Guide walks through every property-level check — zoning, lease review, well water, radon, septic, and structural clearances — in the correct sequence so you don't invest in background checks or training for a property that can't pass inspection.

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